by Michael Winter, USA TODAY

by Michael Winter, USA TODAY

They were born in South Korea in 1987, adopted by different families, separated by the Atlantic and reunited through YouTube a quarter-century later.

Now, DNA tests confirmed what Samantha Futerman, an actress in Los Angeles, and Anais Bordier, a fashion designer living in London, already knew in their bones and faces: They are identical twins who were separated after birth, Good Morning America reported Wednesday.

"It was weird, but I feel like there was a strange calm and comfort as well, and something that I can't really explain," Futerman said of seeing her sister's face for the first time during a Skype chat a year ago. "We talked for three hours."

Bordier, who grew up in France, was alerted to Futerman in February 2013 after friends saw the actress in a YouTube video.

"When I looked at the video, I - it was, like, shocking â?¦," Bordier said. "You can't imagine that you might have a twin sister somewhere that you don't know about."

Adoption documents that Futerman's parents gave her did not identify her birth parents and did not indicate whether she had any brothers or sisters, she told a British newspaper in an interview.

They were born Nov. 19, 1987, in Busan, South Korea, and adopted three months later. Futerman, whose film credits include Memoirs of a Geisha, The Motel and 21 & Over, grew up in Verona, N.J., with two adoptive brothers. Bordier was an only child raised in a Paris suburb.

Bordier reached out to the familiar face on her screen through Facebook, noting the similarities of their personal histories and their physical resemblance.

"When I saw her profile, it was crazy. She looked just like me," Futerman told GMA.

The sisters decided to meet face to face in London. Bordier said she poked Futerman's head to confirm she was real. They met again in Los Angeles, then Manhattan.

Futerman compared the encounters with "that feeling on Christmas when you open up the presents, the one you were asking for, it's that - that pure feeling of joy."

To memorialize their reunion, Futerman turned to Kickstarter to fund a documentary, Twinsters. Only $8,000 to go.